I played a game called Amnesia with my conversation class. The way it works is to have cards with famous names on them, like Madonna, andeach student gets a card, but CANNOT look at it! The task of the students is to break up into group s or pairs and try to tell each other what the identity is! It works great, and gets them thinking and talking. Once someone had "remembered" his/her identity, I handed over a new one, and s/he had to start over!! We played for 50 minutes, but I would say to max out at 40 minutes. They loved it, and it can get LOUD!